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README file for LaTeX package: diffcoeff version 1.1

Author: Andrew Parsloe (ajparsloe@gmail.com) 2018-10-25

diffcoeff.sty allows the easy writing of ordinary and partial differential 
coefficients of arbitrary order. For mixed partial derivatives, the overall 
order (algebraic or numeric) is calculated by the package. Optional arguments 
allow the easy specification of a point of evaluation for ordinary 
derivatives, or variables held constant for partial derivatives, and the 
placement of the differentiand (in the numerator or appended). Some tweaking 
of the display is possible through key = value settings. Secondary commands 
provide analogous coefficients constructed from D, \Delta and \delta and a 
command for writing Jacobians. 

The packages require the LaTeX3 bundles, l3kernel and l3packages.

There are three files plus this README: diffcoeff.tex, diffcoeff.pdf, and diffcoeff.sty. 

(Version 1.0 of diffcoeff.sty was accompanied by diffcoeffx.sty. However
that package contained a bug which meant it did not do all the things
claimed for it. Fixing the bug did not seem feasible without a complete
rewrite. diffcoeffx is now withdrawn.)